1. Molar Mass of Iron

* The molar mass of iron (Fe) is approximately 55.845 g/mol. This means 1 mole of iron weighs 55.845 grams.

2. Avogadro's Number

* Avogadro's number tells us the number of atoms or molecules in one mole of a substance. It's approximately 6.022 x 10^23.

3. Calculation

* Step 1: Determine the number of moles in 1 gram of iron.

* (1 g Fe) / (55.845 g/mol) = 0.0179 mol Fe

* Step 2: Multiply the number of moles by Avogadro's number.

* (0.0179 mol Fe) * (6.022 x 10^23 atoms/mol) = 1.08 x 10^22 atoms of iron

Therefore, approximately 1.08 x 10^22 atoms of iron make up 1 gram of iron.